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Finding the Fourth Proportional to 502.39, 693.21 and 281.35

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Solution

The fourth proportional to 502.39, 693.21 and 281.35 is: 388.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.39 : 693.21 = 281.35 : x
  2. Step 2: Convert to fraction form
    502.39/693.21 = 281.35/x
  3. Step 3: Cross multiply
    502.39x = 693.21 × 281.35
  4. Step 4: Simplify right side
    502.39x = 195,034.63
  5. Step 5: Solve for x
    x = 195,034.63/502.39
  6. Step 6: Final answer
    x = 388.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.